Improvement in scroll-sawing machines



- W. M. & E. N1BOTSFORD.

Scroll-Sawing Machine.

No. 211,129. Patented Jan. 7,1879.

"- FETERS, FHOTO-LITHOGRAP UNITED STATES PATENT OFFICE.

WALLACE M. BOTSFORD AND EUGENE N. BOTSFORD, OF WEST STRATFORD CONNECTICUT.

IMPROVEMENT IN SCROLL-SAWING MACHINES.

Specification forming part of Letters Patent No. 211,129, dated January 7, 1879; application filed May 24, 1878. v

To all whom it may concern:

Be it known that we, WALLACE M. Bors- FORD and EUGENE N. BOTSFORD, of West Stratford, county of Fairfield, State of Connecticut, have invented a new and useful Improvementin J ig-Saws, of which the following is a specification:

y the rods 19 and q, operate the sliding rods a and b. The rods 19 and q have a horizontal motion on the guides e H. On the upper sliding rod, 61, is the saw-adjuster G, comprising the shell 5, thumb-screw t, and nuts to and 00. The thumbscrew t is screwed into the pitman a, and by attaching the lever c to the shell 8 by means of the screw it, a very sensitive adjustment can be obtained.

Fig. 2 is a sectional view of the adjuster G. B is the table, attached to the supports 1 1. One end of the lever f is fastened to the crankpulley r. The other end is connected with the levers e and (Z to the pin 1). The three levers e d fare connected to the rod to. Said rod is attached to the sliding rod 1), swinging freely therein, accommodating itself to the rotary motion of the crank-pulley 'r. A view of rod n is shown at Fig. 3. The levers d and 0 form a togglejoint, operated by the lever f. The other end of lever d is fastened to the pin'm of the skeleton-frame A. The other end of lever 6, together with the connecting-rod p, is attached to the stud at, through which a hole is drilled, allowing it to slide freely on the guide j. The other end of connecting-rod 1) slides on the rod 0 by means of the nut f.

We are aware that levers have heretofore been used for operating saws, and one great objection to their use is the uneven motion of the saw, owing to the cramping of the levers when operated from an immovable fulcruma result which cannot occur with the peculiar arrangement, as described, of the levers and rods in reference to the guides e t j, together with the levers acting directly on a line with the sliding rod, thus permitting a free and easy motion, devoid of cramping and strain- 111 Having described our invention, what we claim as new, and desire to secure by Letters Patent, is-- 1. The combination of the levers e f cl and pins on and b wit-h the crank-pulley r and skeleton-head A, as described and set forth.

2. In combination with levers e f d, the rod u, for operating the sliding rod 1), as set forth.

The guide j and stud n, in combination with levers c f d and rod p, as set forth.

4. The guide 6, nut f, and ears 0 a, in combination with rods p and q and support F, as set forth.

5. The combination of the levers c h g and pins b o with skeleton-head A and sliding rod a, as described.

WALLACE M. BOTSFORD. EUGENE N. BOTSFORD.

Witnesses:

GEO. D. PHILLIPS, L. S. OATLIN. 

